Teknik
Välkommen till vår teknikblogg! Håll dig uppdaterad, följ oss på LinkedIn
Next step in Nix: Embracing Flakes and Home Manager
// Henrik Starefors
In this post, I’ll talk about Nix, provide an overview of Nix flakes, explain their benefits, describe how I migrated my existing setup, and share the code structure I settled on.
Real-Time Q&A Moderation with AI at CADEC 2025
// Andreas Tell
Last year, we introduced the CADEC App — a custom-built iOS and Android mobile app that let attendees submit and upvote questions during each talk. The most popular questions were addressed live in the Q&A session.
For 2024, we relied on manual moderation, but sifting through questions manually just didn’t feel right for 2025. Enter AI-powered moderation: designed to filter out off-topic or inappropriate questions in real time.
This retrospective explores the technical implementation, challenges, and lessons learned.
A Go optimization journey, part 3
// Erik Lupander
An update on the journey of optimizing a text-similarity HTTP request handler with the new swissmap map implementation introduced in Go 1.24.
Faster startup with Spring Boot and CRaC, part 3 - Automated build process
// Magnus Larsson
This is the third part of the blog series “Faster startup with Spring Boot and CRaC”, where we will learn how to automate the build process for creating Docker images for CRaC-enabled applications, including how to warm up the application before the checkpoint. We will create CRaC images for reactive microservices based on Project Reactor and Kafka.
Jfokus 2025
// Ove Lindström
Den 19:e upplagan av Jfokus är slut och nu ser vi fram emot det stora jubileumet nästa år. Eftersom jag verkar finnas med på inventarielistan var jag på plats även i år och såg till att alla talarna fick hjälp av scenvärdar. Årets upplaga var en av de bästa jag varit på och det finns många intryck att smälta. Det här är några av intrycken från konferensen.
The Laws That Secretly Control Your Software Delivery
// Nils Janson
So you think you are in control of your software delivery process? What if I told you that your software delivery process is governed by laws just as the physical world you are living in? In this article, I will explore these often-hidden principles, helping you better understand the challenges and frustrations you may encounter in your daily work. I will offer practical strategies and suggestions to overcome these challenges and improving your teams ability to deliver software successfully.
A Go optimization journey, part 2
// Erik Lupander
Continuing the journey of optimizing a text-similarity HTTP request handler.
Year of the homerow mods
// Henrik Starefors
Today i will share my initial experinces with adding modifers to my keyboards homerow keys. Aka Homerow Mods.
A Go optimization journey
// Erik Lupander
The journey of optimizing a Go web service.
Kroxylicious, Kafka Record Encryption and the Power of Proxies
// Martin Holt
In this blog we will take a look at one way to encrypt your Kafka records using Kroxylicious. This blog post is supported by a working example with source code in this GitHub repository.
Från hålkort till moln - reflektioner från 50 år i IT-branschen
// Peter Hernfalk
50 år i IT-branschen – och fler ska det bli :-)
I år har jag arbetat 50 år i IT-branschen. Under detta halvsekel har jag hunnit med lågt räknat 80 000 arbetstimmar. Jag som verkligen gillar att lära mig nya saker har svårt att tänka mig ett roligare jobb. Det är faktiskt så roligt att jag också har det som hobby.
Ännu en "Alt-conference" på Callista
// Mats Ekhammar
Vad är en alt-conference?
Under och strax efter Covid hade vi börjat gå på online konferenser och känt att de oftast var rätt OK, men vi saknade att komma iväg på riktigt med kollegor. När det sedan blev OK att åka ut igen på konferenser kom många iväg, men några av oss kom inte riktigt till skott igen.
DTO or not DTO?
// Ove Lindström
In this blog we dive into the concept of Data Transfer Objects (DTOs), providing a detailed explanation of their use, design best practices, and how they relate to other object patterns like Value Objects (VO), Domain Objects (DO), and Business Objects (BO). You will gain the understanding that the key to effective use of DTOs lies in their purpose: transferring data efficiently while keeping domain logic separate and testable.
My declarative journey with NixOS
// Henrik Starefors
In this post, I will share my journey of setting up and configuring NixOS as a daily driver from scratch. These are my first steps with NixOS, and they are neither a comprehensive guide nor a tutorial on correct usage; instead, they are stories about how I stumbled through the Nix landscape.
Schemas, Schema Registries and Kafka - Part Three
// Martin Holt
In part one and part two we looked at Schemas and the Schema Registry. In part three we will take a look at schema evolution in Kafka with the help of an example.
Faster startup with Spring Boot 3.2 and CRaC, part 2 - Warmup and configuration
// Magnus Larsson
This is the second part of the blog series “Faster startup with Spring Boot 3.2 and CRaC”, where we will learn how to warm up a Spring Boot application before the checkpoint is taken and how to provide configuration at runtime when the application is restarted from the checkpoint.
Kubernetes and Cloud Native Security Associate (KCSA) preparation
// Henrik Starefors
Not long ago, I passed the KCSA(Kubernetes Cloud Native Security Associate) Exam, and thought that I could share some pointers about my experience in this post.
Schemas, Schema Registries and Kafka - Part Two
// Martin Holt
In part one we looked at some of the popular schema frameworks used with Kafka. In part two we will look at the role of the Schema Registry.
Schemas, Schema Registries and Kafka - Part One
// Martin Holt
In earlier blog posts we have looked at some of the popular schema frameworks that are commonly (although not exclusively) associated with Kafka - Avro, Protobuf and JSON Schema.
This blog post will consider some aspects of choosing a schema framework (part one), and look at the Schema Registry and the role it plays in organising, communicating and enforcing your schemas (part two).
Hackathon: Build a smart scheduling application
// David Ström
By the time you are reading this I’m quite confident many of you are already quite weary of reading about the amazing possibilities of AI in general and LLMs in particular. But perhaps you are still, on a general level, positive about AI and happy to use the tools it has provided so far, but quietly asking yourself “What now? What is next?”. This story is for you. Too.